The chirldren of Nakamura and Yakamawa are playing on the lawn of an apartment complex. Watching the children, Mrs. Nishikawa and Mrs. Yamashita, also residents of the complex, are chatting

N:       Are those children playing over there siblings?
Y:       No, they aren't.
N:       They certainly look like siblings, don't they?
Y:       Do they look that much alike?
N:       Well, I think so. Besides, they are always playing thogether, so I thought they are siblings.
Y:       No. They are the daughters of Mr. Nakamura and Mr. Yamakawa.
N:       Oh, they are both girls? I always thought the shorter one was a boy. She is always dressed like
           a boy, isn't she?
Y:       She is Mr. Yamakawa's daughter. She is certainly like a boy, isn't she?
N:      If you take a good look at her, she looks very much like her father, doesn't she?
Y:      Yes. She looks more like her father than her mother, doesn't she?
N:      Is she the Yamakawas only child?
Y:      No, they have one older boy.
N:      I see...,so they  have one son and one daughter. Just right isn't it?